feat: set deal status completed after completing

services/deal_group.py

@@ -25,11 +25,11 @@ class DealGroupService(BaseService):
         )
         return group.deals if group else []
 
-    async def complete_group(self, group_id: int) -> None:
+    async def complete_group(self, group_id: int) -> list[Deal]:
         deals = await self.get_deals_by_group_id(group_id)
         for deal in deals:
             deal.is_completed = True
-        await self.session.commit()
+        return deals
 
     async def delete_group(self, group_id: int) -> None:
         deals = await self.get_deals_by_group_id(group_id)